automatically insert row

Hello forum, I have a huge problem with Excel and I have no idea how to solve it. Hmm, how do I explain this? Someone is giving me data pulled from a server in an Excel format. I have a column that has a series of entries. For example:

Blank
Entry 1
Entry 2
Entry 3
Entry 4
Entry 5

However, sometimes there's an entry or two missing. So it'll look like this:

Blank
Entry 1
Entry 2
Entry 4
Entry 5

Is there anyway to tell Excel to say "Hey there's an entry missing here," and have it insert a row with the missing entry value? I do not work in Excel ever but people around here do, in case someone has some advice. I already asked the guy if he could just server me the data formatted correctly, and -- of course -- he can't/won't. Thanks in advanced!!